Hydrological Balance of Lake Tana, Upper Blue Nile Basin, Ethiopia

Autor:	Rientjes, T.H.M., Perera, Janaka B.U., Haile, A.T., Gieske, A.S.M., Booij, Martijn J., Reggiani, Paolo, Melesse, Assefa M.
Přispěvatelé:	Faculty of Engineering Technology, UT-I-ITC-WCC, Department of Water Resources, Faculty of Geo-Information Science and Earth Observation, Water Management
Rok vydání:	2011
Předmět:	Hydrology geography geography.geographical_feature_category Nile basin Drainage basin Regionalisation Water balance closure Water balance Hydrological balance Bathymetry Environmental science Regional model Surface runoff Lake Tana
Zdroj:	Nile River Basin ISBN: 9789400706880 Nile River Basin Hydrology, Climate and Water Use, 69-89 STARTPAGE=69;ENDPAGE=89;TITLE=Nile River Basin Hydrology, Climate and Water Use
DOI:	10.1007/978-94-007-0689-7_3
Popis:	In recent years, few studies are presented on the water balance of Lake Tana. In these studies, the water balance is closed by unknown runoff contributions from ungauged catchments. Studies relied on simple procedures of area comparison to estimate runoff from ungauged catchments. In this study, emphasis is on regionalisation approaches by the use of physical catchment characteristics and a regional model. For runoff modelling, the HVB-96 model is selected while automated calibration is applied as based on a Monte Carlo procedure. Closure of the lake water balance was established by comparing measured to estimated lake levels. Results of daily lake level simulation show a relative volume error of 2.17% and a Nash–Sutcliffe coefficient of 0.92. Results show runoff from ungauged catchments of 527 mm/year for the simulation period 1994–2003 while the closure term only is 85 mm. Compared to previous works this closure term is smallest.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ea24677bfa5c92e29e827ce7b93cf3f https://doi.org/10.1007/978-94-007-0689-7_3 Zobrazit plný text záznamu